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Periodic Classification Of Elements

Question
CBSEENSC10010564
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What are the essentials of a chemical equation?

Solution

(i) It must refer to an actual chemical reaction.

(ii)    It should be molecular. For example, H, O, N should be written as H2, O2, N2.

(iii)    It should be balanced and conform to the law of conservation of matter.

Some More Questions From Periodic Classification of Elements Chapter

Why is it necessary to obtain a balanced chemical equation?

Balance the following skeleton equations:
(i)    KClO3 →KCl + O2
(ii)    Na2CO3 + HCl → NaCl + H2O + CO2
(iii)    CH4 + O2 → CO2 + H2O
(iv)    NaCl + H2SO4 → Na2SO4 + HCl
(v)    Fe + H2O → Fe3O4 + H2
(vi)    H2S + O2 → H2O + S
(vii)    H2 + N2 →NH3.

Balance the following chemical equations:
(i)    NaOH + H2SO4 → Na2SO4 + H2O
(ii)    HNO3 + Ca(OH)2 → Ca(N03)2 + H2 O
(iii)    FeCl2 + H2S → HCl + FeS 

What does a balanced chemical equation convey to a chemist?

list the limitations of chemical equation.

What are the essentials of a chemical equation?

What information is available from the following equation:
CaCO3 + 2HCl→ CaCl2 + H2O+ CO2

What is a thermochemical equation? Give two examples.

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